Reactance-coil.



PATENTED APR. 30, 1907 REAOTANCE COIL. APPLICATION FILED M123, 1906.

2 SHEETS-SHEET 1.

INVENTOR WITNESSES ATTORN EY UNITED STATES PATENT OFFICE.

CHARLES LE G. FOltlliStll'li, ()l \YlLlilXSlEl'ltG. ll'lXNbYLVAXiA,ASSIGNOR TO 'ESTINGHOTISE lildCUlltltI {X1 MAXllZdUllflilNG COMPANY, A'COR- PORATION OF PTLNNHYLVANIA.

REACTANCE-COlL.

Specification of Letters Patent.

Patented April 30, '1907.

Application filed Marci. 23, 1906. Serial No. 307,732.

To rr/./ 'u'imm 1T1 luv/l, conic/aria.

Be it known that 1, CHARLES lit: (1. FOR TESGUE, a subject of the liingof (treat Brit-- ain, and a resident of Vt'ilkinslnirg, in the 5 countyof i-kllegheny and State of Pennsylvw nia, have invented a new anduseful lmrovement in Reac'tai'1ce;(.oils, of which the ollowing is aspecification.

My invention relates to electric apparatus IO and it has for its objectto provide transformers or reactance coils which shall be adapted foruse in connection with polyphase electriccircuits and shall embody a.specially advantageous and symmetrical design.

It is often desirable to use transformers and reactance coilsinconnection with rotary converters or for similar purposes and l proVide, according to my present invention, a 20 c il group which comprisesin general, magnetizable core members which are symmetrically disposedand are supported by a nonmagnetizable frame structure and means formagnetically interconnecting the several core members. The aforesaidnon-magnetizable supporting frame may be relatively light since all theel' tromagnetic stresses are balanced by reason of the symmetricaldistribution of the flux A further advantage of my improved coil grouplies in the fact that the inductance may readily be adjusted withoutdisturbing the symmetry of the arrangement.

1n the accompanying drawings, Figure l is a plan view, of a reactancecoil group which is adapted for use with three-phase altcrnating currentcircuits and which is constructwl in accordance with my invention,certain of the parts being broken away to more full 4o disclose thestructure. Fig. 2 is av view, partially in elevation and partially insection, of the group shown in Fig. l.

1 ltel'ei ring to the drawings, the device illustrated compriseslaminated core members 1 2 and 3, the longitudinal axes of which areparallel and symmetrically disposed and which h eve the general form ofsouarc brisms. The four corners of each core incinher are similarlyprovided with notches t to 50 lit a suitablesupporting frame. 7

llcactance coils 5, (i and 7 are wound upon cylindrical spools S, t) andl which are fitted over the core members 1, L and 3, and the 1 severalcore mei'nbers are of sufficient length to extend a short distancebeyond the spools at each end.

The positions of the spools upon the core members and the relative.positions of the several core members are determined by anoii-magnetizable frai'ne structure which is 60 comprised of two similartriangular clamps 1] and 1'3. 1 The triangular clamps are notched toengage the corners, and the notches t, of the core Inen'ibers and havebeveled edges to lit together. The beveled edges of the clamps are boundtogether by suitable bolts 13 and the upper and lower clamps arefastened together by strips 14 which are parallcl to the core mcmlmrsand are attached to the three sides of the triangular clamps near theirmiddle points in order to avoid interference with the spools on whichthe coils are wound. The three core members are further supported byspacing strips 15, which are fastened to the side strips of thetriangular clamps opposite the strips 14 and the ends of which arebeveled to engage the inner corner notches of the core members. Thetriangular clamps l 1 and 12, the connecting strips H and the spacingstrips 15 are preferably constructed of wood and are of such thiclc nessthat their surface is ilush with the ends of the core members when theyare attached thereto.

The core members 1, 2 and 3 are interconnected magnctiiadly by laminatedring core members 16 and 17, that are constructed by vindingmagnetizable strap upon spools formed by center blocks 20 to which theirdisks 21 of non-magnctizable material are at tachcd. The differencebetween the outer and inner radii of the rings is substantially equal tothe width of the core members 1, 2 and .3 and the inside diameters aresuch that the ring core members are adapted to engage the entire endsurfaces of the core members. 'lliesc rings serve to symmetricallydistribute the flux, and the magnetic forces produced when the coils areenergized tendto hold the ring against the ends of the other coreincinbcrs so that all the parts are readily held togethcr by arelatively light frame structure and vibrations of the core are avoided.

The ring core members are held in position against, the prismatic coremembers by tri armed supports 18 which comprise an upper rsngementshows, but me readily be en'sbodlecl in transformers or reectance structures having any number of coils, and I de sire that variations in sizeand errs'ngeinent of details which do not depart from the spirit of myinvention shall be included Within its scope. I

I claim ss my invention:

, 1. The combination with core members, of coils Wound on said members,in:'1gn eti zebie end rings which interconnect ssirl core menibers, enda supporting frame of nonrneg netizsble materiel.

2. The combination .vith cylindrical coils, a. core member for eachsoil, and magnetizsble end rings, of s laminated structure forinterconnecting ssid core members.

3. The combination with cylindrical coils, miignetizsble cores thereforheving longi' tudinsl grooves and s noi'i-nisignetissble supportingframe for said members which is adapted to engage said grooves, of megnetizable end rings of laminate-(l structure that are adapted tomagnetically interconnect ssid sore members. 7

l. The combination with three coils which are symmetrically disposed atthe corsets of a triangular non-magnetiznble support, andinterconnecting rings therefor, which are wound with insgnetizeble strepand which.

are adopted to engage theenlls of ssideore members, of means for bindingthe several parts together.

5. The combination with eni'lring mean hers of megnetizsble materiel,prismatic core members 01" equal length that are located between thering members, coils that Wound upon said core members and a frame ofnonmegnetizable materiel for maintaining a. relstive lateral position ofthe severehfiarts, of means for holding the rings in position againstthe ends of the core members.

6. The combination with end ring members of megnetizsble materiel, pi'sm s'itie core members of equal length that are loeated be tween thering ineinbers,'coils that are Wound upon ssid core members and frame ofnonmsgnetizable material for maintaining a relative lateral position ofthe several parts,

of ineens for holding the rings in position against the ends of the coremembers, that comprises an upper and "3; lower bracket snol e bolt whichpasses through the center of the end rings end binds the two bracketstogether.

7. The combination with end ring members of-insgnetizable materiel,prisi'nstic core ii'iernbors of equel. length that are symmetric allydisposed between the ring members', 7o-

coils that are Wound upon said core members and 9, frame ofsoi'i-msgnetisable material for maintaining 11 relative lateral positionof the several parts, of means for holding the rings in position againstthe ends ol the core mem 7 5 hers. that comprises an upper and a lowerbracket and e bolt which passes througl'i the center of the end ringsend binds the two brackets together.

8. The combination with end ring memhere that are construe ed ofmngnetizsblc strap and laminates p inetic core members of equal lengththat symmetrically (l1sposed between the ring members, of coils that arewound upon said core members and a frame of non- Inagnetizeble materialfor nminteining a relative lateral position of the several parts. 9. 'lhe combination with end ring members that are constructed of ms'uetimble e trap, laminated prismatic core members of equal length thatare synunetriosll disposed between the ring members, coi s that arewound upon seirl core members end a frame of non "esgnetizsble materielfor maintaining it relative lateral position of the several parts, ofmeans for holding the rings the ends of the core memhere, that comprisesan upper and 0. lower brecket end a bolt which passes through the I00center of the end rings and binds the two' brackets together.

testimony whereof, I have hereunto subscribed my name this 22nd day ofMarch,

CHARLES LE liQltl. QSCUE.

Witnesses:

Horzome ll. lbononsxrrr, BIRNEY limes.

